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Infection and Immunity 2- Lecture 8
Trimethoprim-Sulfamethoxazole (TMP-SMX), Clindamycin, Metronidazole, Chloramphenicol
14
Medical
Professional
04/29/2013

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Cards

Term
6 Diseases to use TMP-SMX (trim/sulfa) for
Definition

Acute uncomplicated UTI

Prostatitis

Travelers & shigella diarrhea

Nocardia

Listeria (if can't use penicillin)

Pneumocystis jiroveci pneumonia

 

Term
2 MOAs of sulfonamides
Definition
a.   selectively inhibit dihydropteroate synthase, which does synthesis of dihydrofolic  acid
b.    competitively  inhibit  incorporation  of  PABA
Term
MOA of trimethoprim
Definition
selectively blocks folate reduction by dihydrofolate reductase in bacteria
Term
Who have the worst adverse reactions to TMP-SMX?
Definition
HIV patients
Term
4 Adverse reactions to TMP-SMX
Definition
wierd skin/mucosal rashes, GI upset, bad in pregnancy, bad in G-6-PD deficiency
Term
MOA of clindamycin
Definition
binds 50S ribosomal subunit and blocks translocation to stop prot. synthesis
Term
Diseases Clindamycin is used in (2)
Definition

- Anaerobic infections

- for really bad strep skin infection

Term
Main adverse reaction to Clindamycin
Definition
diarrhea and/or C. diff
Term
What type of diseases Metronidazole is used for
Definition
Anaerobes and protozoans (parasites)
Term
MOA for Metronidazole
Definition
undergoes a reaction catalyzed by pyruvate:ferredoxin oxidoreductase and makes free radicals to kill bacteria and protozoa
Term
3 Adverse reactions to Metronidazole
Definition

Metallic taste

dark urine

Disulfram-reaction w/ alcohol

Term
Diseases Chloramphenicol is used for
Definition
Meningitis or resistant organisms (or in 3rd world countries b/c it's cheap- causes gray baby syndrome and anemia)
Term
MOA of Chloramphenicol
Definition
reversibly binds to 50S ribosomal subunit to inhibit protein synthesis
Term
Chloramphenicol is antagonistic to what other antibiotic?
Definition
macrolides
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